Is he trying to talk to me again?

I had a very odd friendship with a guy, he used to basically lie to me to get attention, and ring me every day near enough and have pointless conversations at silly times in the morning. half the time about his ex and about how so many girls desire him. We fell out really bad because I was just fed up with his antics. So now I see him from time to time, but he won't speak to me, he'll keep looking over from the other side of the room and try to get in my way, so that I'm guessing I acknowledge him. is he just being and attention seeker ? is he trying to talk to me again? Or am I over thinking it?